Hot-air furnace



(No Model.) j

W. L`. MGDOWYELL.

HOT AIR FURNAGB.

No` 362,297. Patented May 8, 1887.

lig. 4.

Iig. 9.

WTNESSESZ N4 PETERS. Pholtrullwgmpher. Washmgion. D. C.

UNITED Srrvrnsl PATENT OFFICE.

VVILLIAM-L. MODOVELL, OF LOWER MRIFON, PENNSYLVANIA.

SPECIFICATION forming part of Letters Patent No. 362,297, dated May3,1887

Application filed July 7, 1886. Serial No. 207,318. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM L. MoDownLL, a citizen of the United States,formerly residing in the city and county of Philadelphia, State ofPennsylvania, but now a resident of Lower Merion, Montgomery county,Penn- Sylvania, have invented a new and useful Improvement in Heaters,which improvement is fully set forth in the following specication andaccompanying drawingsfin which-a Figure 1 represents a perspective viewof a heater embodying my invention. Fig. 2 represents avertical sectionthereof. Fig. 3 represents a vertical section of a portion in line .frx, Fig. l. Fig. 4 represents a front elevation of the pipe-openingportion of the casing.

Fig. 5 represents a vertical section in line y y,

Fig. 4. Fig. 6 represents a vertical section of upper and lower portionsof the casing in lines z z, Fig. 1.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention relates to improvements in heaters; and it consists inacasing having its sides formed of removable panels, as hereinafter setforth and claimed, whereby the inner portion of the heater is readilyaccessible when desired for repairs or other purposes without disturbingthe hot-air pipes.

Referring to the drawings, A represents the casing of a heater, the samebeing formed of cast met-al, avoiding brick or masonry work andsheet-iron as a casing, and producinga durable article.

The casing may be lined with tin or galvanized iron for preventingdirect radiation of heat in the cellar or apartment containing thefurnace. The casing has a front wall, B, a rear wall, C, a top rim, D,and a base, E, the said ri1n D resting on the upper ends of the saidfront and rear walls, as shown in Fig. 2. The sides of the` casingconsist of removable panels or plates F, which are of greater lengththan the distance between the rim D and base E, so that their upper andlower ends stand behind or within said rim and base.

' Within the rim D are ears G, which are cast therewith, the spaceswithin the said ears and rim forming grooves to receive the upper endsof the panels F of the sides of the casing, said ends having tongues G',which enter said grooves or ears G. On the upper face of the base is agroove, H, which receives the lower ends of said panels, both groovesbeing plainly shown in Fig. 6.

When the parts are in the position shown in Fig. l, a panel may beremoved by raising the same until its lower end is above the walls ofthe groove H. rlhe panel is then drawn outwardly at the bottom, and thetop end clears the Walls of the ear or groove G, the panel thus beingdisplaced and permitting access to the heater or interior of the casingfor purposes requiring the same.

Y In order to return or restore the panel, its upper end is placedbehind the rim D and the ypanel raised, said end entering the ear orgroove G. rllhe lower end of the panel is then pushed back and the panelpermitted to descend, whereby said lower end enters the groove H, andthe panel is thus nicely retained in position.

J represents the feed-door, the frame K'of which is connected with theheater in usual manner and passes freely through an enlarged'opening, L,-in the front wall, B, of the casing. Fitted to the flange or rim M ofthe outer end of the frame K,at opposite sides,are

bolts N, which pass freely through the slots l? in the front wall of thecasing, and are provided with tightening-nuts 1? on the back of saidwall. By this provision when the heater expands the frame K moves freelyin the opening in the front wall, thus preventing strain on said walland cracking or breaking of the same. l

Q represents the plate which supportsthe smoke pipe orilue R, the samebeing separate from the rear wall of the casing and connected therewithby means of bolts S, which pass freely through slots T in the rear wall,it being noticed that the opening in said wall for the passage of thesmoke-pipe is larger than that in the plate Q, and that the bolts areprovided with tightening-nuts Q on their inner ends. By this provisionwhen the heater expands the plate Q moves freely on the rear wall, thuspreventing strain on said wall and cracking or breaking ofthe same.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. Av heater having a top removable rim 5 with inner ears, G, forminggrooves, front and back Walls supporting said rim, and side plateshaving upper end tongues, G', and a base with groove H, allsubstantially as and for the purpose set forth. 1o 2. A heater havingthe rini D, With inner ears, G, forming grooves, the front wall, B, andback wail, C, supporting said rim, the plates F, having tongues G', anda base-plate with groove H, the said plates F having their lower ends insaid grooves H, all substantially as t 5 described.

WM. L. MCDOWELL. Witnesses:

'JOHN A. WIEDERSHEIM,

A. P. GRANT.

